A compact and small size multichannel collimator for neutrons with energies up to 50 keV is provided. The collimator has a multichannel structure composed of collimating channels (in air, vacuum or in the non-interacting atmosphere of Helium-4) alternating with “full” channels made with absorbent materials for slow neutrons. The geometry of the individual collimating and absorbing channels can be arbitrary. The geometry with channels of square section, such as to create a perfect checkerboard, is preferred from the point of view of ease of construction.

An apparatus is configured to receive x-rays propagating from an x-ray source. The apparatus includes first and second x-ray diffractors, the second x-ray diffractor downstream from the first x-ray diffractor and first and second x-ray detectors. The first x-ray diffractor is configured to receive the x-rays, to diffract a first spectral band of the x-rays to the first x-ray detector, and to transmit at least 2% of the received x-rays to the second x-ray diffractor. The second x-ray diffractor is configured to receive the transmitted x-rays from the first x-ray diffractor and to diffract a second spectral band of the x-rays to the second x-ray detector. The first x-ray detector is configured to measure a first spectrum of the first spectral band of the x-rays and the second x-ray detector is configured to measure a second spectrum of the second spectral band of the x-rays.

There is provided a radiographic imaging apparatus capable of alignment of a detector with a collimator with a position of a radiation source fixed. The radiographic imaging apparatus includes the radiation source which irradiates a subject with radioactive rays, a plurality of detecting elements which detect photons in the radioactive rays, and a collimator which is disposed between the radiation source and the detecting elements and has a plurality of walls which form a plurality of passing holes that the radioactive rays pass. The detecting element and the collimator are aligned with each other in a direction which is orthogonal to a direction that the subject is irradiated with the radioactive rays such that a ratio or a difference between output signals from the detecting elements which are mutually adjacent with the wall being interposed falls within a predetermined range.

An X-ray analyzer includes an X-ray source, a straight tube type multi-capillary, a flat plate spectroscopic crystal, a parallel/point focus type multi-capillary X-ray lens, and a Fresnel zone plate. A qualitative analysis is performed over an area on the sample, the flat plate spectroscopic crystal and the Fresnel zone plate are removed from the X-ray optical path, and X-rays are collected by the multi-capillary lens and the sample is irradiated. When analyzing the chemical morphology of an element, the multi-capillary lens retracts from the optical path, the source rotates, and the flat plate spectroscopic crystal and the Fresnel zone plate are inserted on the optical path. A narrow sample area is irradiated by the Fresnel zone plate with X-rays having energy extracted from the flat plate spectroscopic crystal. This makes it possible to carry out accurate qualitative analysis on the sample and perform detailed analysis of more minute parts.

The present disclosure relates to a collimator. The collimator may include a motor, a transmission unit having a first end and a second end, and a leaf unit having a leaf. The first end of the transmission unit may be connected to the motor and the second end of the transmission unit may be connected to the leaf. The present disclosure also relates to a collimator system. The collimator system may include a leaf module having a leaf, a driving module having a motor configured to drive the leaf, and a processing module to generate a movement profile of the leaf. The movement profile of the leaf may include a first speed during a first stage, a second speed of the leaf during a second stage, and a third speed of the leaf during a third stage.

A scanner comprises an electromagnetic wave source; a collimator positioned to alter the electromagnetic waves emitted from the electromagnetic wave source into an electromagnetic beam; and a detector positioned to measure one or more levels of electromagnetic energy of the electromagnetic beam, wherein a collimator element is spatially adjustable in at least one axis via one or more adjusting mechanisms to change the one or more levels of electromagnetic energy measured the detector.

A support unit and a collimator are relatively rotated about the axis of rotation by a rotation driving device. The collimator has a blocking region that blocks X-rays and a transmission region that allows X-rays to pass therethrough. The transmission region has a vertex positioned on the axis of rotation, and the circumferential length of the transmission region increases proportionally as it advances outward from the vertex. A sample supported by the support unit is irradiated with X-rays by an X-ray source through the transmission region of the collimator, and the fluorescent X-rays from the sample are detected by the detector. The analysis of a composition of a sample is performed based on the fluorescent X-rays detected by the detector.

A collimator assembly for an x-ray optical system having a Soller slit for collimation of x-ray radiation with respect to the direction of an axis (z) of the Soller slit, wherein the Soller slit has a plurality of lamellae spaced apart from one another and having lamella planes parallel to one another, is characterized in that the Soller slit comprises a plurality of segments which are arranged along the axis and are separated from one another. The arrangement also has a collimator frame for enclosing and guiding the segments, and at least one of the segments is displaceable with respect to the frame and relative to other segments. A simple but nonetheless accurate adjustment of the spectral resolution of an x-ray spectrometer to a respective different analytical application is thus enabled in a compact and cost-effective manner.

A spectroscopic element and a detector are disposed along a circumference of one Rowland circle. The spectroscopic element has a spectral surface whose length, measured along the Rowland circle, is shorter than a length in the Rowland circle plane, of an irradiation surface irradiated with excitation beams emitted to a sample holder. The spectroscopic element and the sample holder are disposed to separate a group of characteristic X-rays within a common spectral range of the spectroscopic element.

The present invention is directed to multiple aperture devices (MADs) for beam shaping in x-ray imaging. Two or more of these binary filters can be placed in an x-ray beam in series to permit a large number of x-ray fluence profiles. However, the relationship between particular MAD designs and the achievable fluence patterns is complex. The present invention includes mathematical and physical models that are used within an optimization framework to find optimal MAD designs. Specifically, given a set of target fluence patterns, the present invention finds, for example, a dual MAD design that is a “best fit” in generating the desired fluence patterns. This process provides a solution for both the design of MAD filters as well as the control actuation that is required (relative motion between MADs) that needs to be specified as part of the operation of a MAD-based fluence field modulation system.